Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N9DXR callsign genealogy
Currently held by ZEMAITIS, FRANK M
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by N9DXR's current licensee, walking backwards.
- CASTLEBERRY, DANIEL DILgranted 2009-01-12cancelled 2017-02-22
Successor callsigns
Callsigns held now by people who previously held N9DXR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9DXR, oldest first.
- ZEMAITIS, FRANK M IL2004-08-24 → cancelled 2016-08-25
- CASTLEBERRY, DANIEL D IL2017-02-22 active